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AD6190ARSRL Datasheet PDF : 8 Pages
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a
900 MHz RF Transceiver
AD6190
FEATURES
The receiver section includes a Low Noise Amplifier (LNA).
Complete 900 MHz RF Transceiver
The LNA’s output drives an image-reject mixer; the mixer’s
LNA
output optimized for 10.7 MHz is filtered and processed by the
Receive Mixer
limiting IF amplifier.
Transmit Mixer
The transmit section accepts a modulated 10.7 MHz IF input,
Driver Amplifier
and uses an image-reject upconverter to mix the signal up to the
VCO
902 MHz–928 MHz RF carrier frequency while suppressing the
Prescaler
Limiter Amplifier with RSSI
On-Chip Low Dropout Regulator
Independent Sleep Modes for TX, RX
28-Lead SSOP Package
E APPLICATIONS
902 MHz–928 MHz ISM Band Cordless Telephones
902 MHz–928 MHz ISM Band Wireless Data Systems
T GENERAL DESCRIPTION
The AD6190 900 MHz RF Transceiver provides a complete
RF/IF section for systems operating in the 902 MHz–928 MHz
E license-free ISM band. The high level of integration allows several
dozen discrete components to be replaced. It is ideally suited
L for use in cordless telephone and wireless data applications.
unwanted image and LO components. The RF output is raised
to a nominal 0.5 milliwatt (–3 dBm) output level. This output
can be used directly or can drive an external power amplifier to
higher levels.
The on-chip VCO operates at 2× the local oscillator frequency.
This reduces oscillator pulling due to strong interferers in-band
or transmitter leakage. An on-chip 64/65 prescaler allows the
VCO to be controlled by a low cost 15 MHz CMOS synthesizer.
An on-chip low dropout regulator minimizes VCO pushing. The
transmit section, receive section, or both, can be placed in a low
current SLEEP mode when not in use. The AD6190 900 MHz
RF transceiver is packaged in a 28-lead SSOP package.
The AD6190 900 MHz RF Transceiver is part of the Analog
Devices/Zilog “A-to-Z Phone” Spread-Spectrum System for
cordless telephone and data communications applications. Con-
tact Zilog directly at (408) 370-8000 for more information on
the Z87000 series baseband controller chips.
SO ANT
FILTER
BT/R
S/W
OPA
FUNCTIONAL BLOCK DIAGRAM
10.7
10.7
VREG
VCO
0
90
AD6190
/2
IQ
POWER
MANAGEMENT
AND
CONTROL
RSSI
LIMOUT
TXON
RXON
VCOON
Z87L00
SPREAD-
SPECTRUM
CONTROLLER
64/65
VOLTAGE
REGULATOR
VBATT
VREG
0
90
10.7
15MHz SYNTHESIZER
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
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